# VNPT SmartCA vs ISYD1

The clearest difference is update cadence: VNPT SmartCA at every 4 weeks against ISYD1's every 2 months. ISYD1's advantage is iOS requirement (11.0 vs 13.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

VNPT SmartCA ships an update every 4 weeks, ISYD1 every 2 months. The most recent releases landed on October 28, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | VNPT SmartCA | ISYD1 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.1 (20 ratings)](https://appshunter.io/ios/app/vnpt-smartca/id1540522462/reviews)** | — |
| Number of ratings | **20** | — |
| Positive reviews | 44.6% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 weeks** | Every 2 months |
| Monetization | Free | — |
| Size | 122 MB | 20 MB |
| Requires iOS | 13.0 | **11.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Vietnam Posts and Telecommunications Group](https://appshunter.io/developer/1215567249) | [AU LAC TECHNOLOGY APPLICATIONS AND MEDIA SERVICES COMPANY LIMITED](https://appshunter.io/developer/1118636718) |

## What reviewers say

### VNPT SmartCA

[App page](https://appshunter.io/ios/app/vnpt-smartca/id1540522462)

This app provides a secure and efficient remote digital signing solution, allowing users to manage and execute digital signatures directly from their mobile devices. It offers features like online account registration, unlimited signing capabilities, and transaction tracking for a comprehensive digital signing experience.

**Highlights:** Online account registration with eKYC, Unlimited digital signing, Manage multiple certificates on one device, Online certificate registration and renewal, Sign, receive, and share files, Track digital signing transactions

**In-app purchases:** none


### ISYD1

[App page](https://appshunter.io/ios/app/isyd1/id6451059402)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is VNPT SmartCA free?

VNPT SmartCA is free to download, with no in-app purchases.

### Is ISYD1 free?

ISYD1 is free to download, with no in-app purchases.

### Do VNPT SmartCA or ISYD1 have ads?

Neither VNPT SmartCA nor ISYD1 shows ads.

### Which is updated more often, VNPT SmartCA or ISYD1?

VNPT SmartCA ships an update every 4 weeks, and ISYD1 every 2 months. Most recently, VNPT SmartCA was updated on October 28, 2026 and ISYD1 on October 25, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*